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Indoor Air Contaminants in Hospitals

“It often said that Hospitals are not the best place to be if you are ill”. As predominant aerobic bacteria, fungi and potential pathogenic organisms prevalent in the hospital environment. Often these germs and bacteria are bought into hospitals by the patients. So, no matter how careful a facility is about disinfecting surfaces, new germs and bacteria are introduced on a daily basis, often evolving beyond the effectiveness of current antibiotics.

• A significant consideration in Operation Theatres is the control of aerosols, anesthesia gases and smoke. In Operation Theatres, however the main sources have an indoor origin are the patient, the surgical team and equipment. The anesthesia gases dispersed in Operation Theatres are also considered as pollutants. The anesthesia gases are dispersed in the environment through problems in the equipment and from the exhalations of the patient. Some gases used in the surgery. During surgery the highest concentration of gases is on the floor. However, with the movements of people these gases can be mixed with room air and inhaled by the surgical team.
The concentration of gases in the Operation Room is critical and needs to be controlled; otherwise the productivity and quality of the work of the surgical team can decrease, and in the medium and long term health problems may occur.

• Halothane gas, for example, has a high toxicity and can affect the central nervous system. The gas concentration is controlled by the air change rate in the Operation Theatre by dilution to acceptable levels.

• The smoke can be generated by laser or electro surgery unit. “Research studies have confirmed that this smoke plume can contain toxic gases and vapours such as benzene, hydrogen cyanide, and Formaldehyde, bioaerosols, dead and live cellular material (including blood fragments), and viruses. At high concentrations the smoke causes ocular and upper respiratory tract irritation in health care personnel, and creates visual problems for the surgeon.

• In some critical situations the indoor air in Operation Room will be ultra-cleaned, for example, for orthopedic surgery, traumas, implants, burn patients, and other situations where the patient is immune compromised. Otherwise, when the surgery is septic, there should be also a higher control in the indoor environment, to protect the adjacent areas.

• Controlled Ozone is injected in the mainstream air in the return air duct. It is present in the indoor space at the times at low concentration. When it encounters chemical pollutants, it almost instantly oxidize them and keeps the indoor air free of chemical pollutants VOC as interferes with metabolism of cell multiplication of fungi resulting in the reduction of fungi along which is responsible for vide range of indoor related allergies.

• Use of Ozone Generator in Operation Theatre Fumigation will reduce the electricity consumption & also no long hour sterilisation before and after operation.

Source of Indoor Air Contaminants in Hospital

▪ Patient.
▪ The Surgical Team.
▪ Equipments.
▪ Infrastructure.

Concern Area

▪ To reduce/eliminate the microbial contaminants.
▪ Maintain very good Indoor Air Quality (IAQ).
▪ Safety of Patient & Surgical Team.

Indoor Air Contaminants Purification Solutions for Hospitals

• Operation Theater Sterilization.
• Operation Theater Fumigation.
• Disinfection for entire Hospital through AHU Ozonation.
• Disinfection for ICU & ICCU.
• Disinfection for Doctor’s Rooms.
• Cold Storages & Morgue.
• Disinfection of medicine & equipment sores.

Advantages of Ozonation in Hospitals

• Ozone is a very powerful oxidant, sterilizes spaces very fast.
• Advance technology for fumigation.
• Ideal for OT, ICU, research centers, labs, Pharma, bio-medical etc.
• Ozone is generated at site & can be on line.
• Ozone is generated from ambient air, using electricity.
• After treatment residual Ozone is transformed into harmless Oxygen.
• No toxic or harmful by product generation.
• Easy to retrofit in existing & new installations.
• User friendly.

How Ozone can reduce Electricity Consumption & achieve Energy Efficiency in Hospitals:

AHU system takes “Outdoor/Fresh Air” to dilute Volatile Organic Compound (VOC) and reduce Carbon dioxide (CO2) within acceptable limits. Conventionally Fresh Air is used to improve Indoor Air Quality (IAQ).

Load profile of fresh air

» 60% to cool moisture … wasted energy
» 28% to cool nitrogen …..wasted energy
» 12% to cool oxygen …..the only useful component in fresh air

Solution to reduce the “ Fresh Air Intake”:

» By using controlled injection of ozone.
» Oxidation of VOC is performed by ozone and not by oxygen of the fresh air.
» Ozone is more powerful oxidizing agent than oxygen.
» In the presence of a more powerful oxidant, less powerful oxidant does not have the chance to perform oxidation, until no more of the former is available.
» Oxygen of the fresh air is preserved and not spent in performing the task of oxidizing the VOC, which is now transferred to ozone.
» Available oxygen is now used entirely to maintain CO2.
» Intake of fresh air is reduced drastically. Thus fresh air requirement goes down to 5CFM or less per person.

Ozone Equipments & Accessories

▪ Portable / mobile air ozonator.
▪ Online air fed Ozonator.
▪ Online Oxygen fed Ozonators.
▪ Ozone Cabinets.
▪ OT Ozonators with Air Handling Blowers.
▪ Air Ozone sensor with monitor.
▪ Air Ozone sensor with controller.
▪ Air ozone Safety Interlock.

Ozone Generator Installation Options

▪ Portable / Mobile
▪ Inside OT/ICU AHU room
▪ Inside OT/ICU with blower
▪ Outside OT/ICU with blower & Duct
▪ Inside AHU rooms for Entire Hospital

Ozone Generator Models for Operation Theatre (OT)

Ozone Generator Models for AHU & other Hospital Air Treatment Applications

Click to Download - Our Total Solutions for Hospitals Indoor Air, Water & Wastewater Treatment


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